Normal Operation - Low Beams
WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The smart junction box (SJB) sends reference signals to the headlamp switch through circuits CLF19 (VT/GN), CLF23 (WH/VT), CLF24 (YE/BU) and CLS05 (BU/GY). At any given time, the headlamp switch routes one of the input circuits to ground through circuit GD114 (BK/BU).
When the SJB detects the headlamp switch in the HEADLAMPS ON position with the multifunction switch in the LOW BEAM position, the SJB provides voltage through circuits CLF04 (BN/BU) and CLF05 (BU/GN) to the LH and RH low beam headlamps, respectively.